A lot of sites have flash ads with sound or video. And don't always have mute controls, or for that matter any way to tell which tab it's coming from. I stopp

A lot of sites have flash ads with sound or video. And don't always have mute controls, or for that matter any way to tell which tab it's coming from. I stopped going to That Other Tech News Site [1] after this happened to me with one of their ads. In addition, poorly designed ads (or, for that matter, JavaScript) can leak memory and peg CPU to 100%. Sometimes your bandwidth is limited, e.g. I'm writing this from a public wifi connection. And if you're on 3G / 4G connection and paying by the megabyte, do you really want video ads? I think not... [1] http://slashdot.org http://slashdot.org